Moyno® 500 Pumps - Service Manual (Sanitary/Hygenic Non
Contents
1. Faces may be cracked from freezing or thermal shock Replace seal Pump Will Not Prime 1 Air leak on suction side Check pipe connections MAINTENANCE General These pumps have been designed for minimal maintenance routine lubrication and adjustment of pack ing The pump is one of the easiest to work on because the main elements are very accessible and require no tools to disassemble Bearing Lubrication The prelubricated fully sealed bear ings do not require additional lubrication PUMP DISASSEMBLY WARNING Before disassembling pump disconnect power source and thoroughly bleed pressure from system Failure to do so could result in electrical shock or serious bodily harm 1 Disconnect suction and discharge piping 2 Remove quick clamp 80 holding suction housing 2 to pump body 1A Remove suction housing and stator 21 3 Remove rotor 22 from flexible joint 24 by turning counterclockwise RH thread 4 Flexible joints 24 can be removed from shaft 26 by turning counterclockwise with a 3 16 Allen wrench Universal joints in the sanitary pump may be further disassembled by removing the snap rings allowing the pins to be removed 5 Carefully slide the mechanical seal 69 off the shaft 26 Carefully pry the seal seat out of the pump body 1A If any parts of the mechanical seal are worn or broken the com plete seal assembly should be replaced Seal components are matched parts and are not2. interchangeable 6 The bearings 29 and shaft 26 assembly can be removed from pump body 1B after the snap ring 66 has been removed To remove the assembly lightly tap the shaft at threaded end using a block of wood to protect the threads The bearings may be pressed off the shaft PUMP ASSEMBLY To Assemble Mechanical Models 1 Press bearings 29 on the shaft 26 and locate the slinger ring 77 near the bearing on threaded end of shaft Note When replacing bearings always press on the inner race when assembling to shaft and on the outer race when pressing bearings into the housings 2 Press the shaft assembly into the pump body 1B securing with snap ring 66 3 Install the mechanical seal 69 using the following procedure a Clean and lubricate sealing faces using a clean light vegetable oil not grease Caution Do not use oil on EPDM paris Substitute glycerin or soap and water or suitable food contact lubricant b Lubricate the outer surface of the seal seat and push the assembly into the bore in the pump body 1A seating it firmly and squarely lt gt Use only on 331 amp 332 Models Page 3 c After cleaning and oiling the shaft slide the seal body along the shaft until it meets the seal seat d On Hygienic Models install the seal spring and spring retainer on the shaft 4 Thread the flexible joint 24 into the shaft 26 in a clockwise direction RH thread The sa
3. meet 3A or dairy requirements When ordering parts please specify pump model number pump serial number part number part description and quantity For additional information on pumps call 1 800 845 1310 on parts call 1 800 325 1331 In Ohio for information on either pumps or parts call 937 327 3553 2002 by Robbins amp Myers Inc Moyno is a registered trademark of Moyno Inc Moyno Inc is a Unit of Robbins amp Myers Inc
4. F To Request a Quote S P amp PE CALL US 1 847 882 8116 MOYNO Always the Right Solution Section MOYNO 500 PUMPS Page 1 of 4 Date March 2002 SERVICE MANUAL MOYNO 500 PUMPS SANITARY HYGIENIC NON MOTORIZED 331 332 333 AND 344 MODELS SANITARY MODELS These pumps include housings polished to a 4 finish both inside and out The mechanical seal is a 3A approved seal with carbon ceramic faces The elastomers meet the FDA requirement for food contact These pumps meet 3A requirements The universal joint may be dismantled for cleaning HYGIENIC MODELS These pumps provide the quick disassembly features of the sanitary version for easy cleaning The housings are 316 stainless steel construction however they are not polished These pumps utilize rubber covered universal joints The stators are available in non FDA nitrile EPDM and fluoroelastomers The mechanical seals are rubber bellows type with carbon ceramic faces INSTALLATION Mounting Position Pump may be mounted in any position When mounting vertically it is necessary to keep the bearings above the seals to prevent possible seal leakage into the bearings Pre Wetting Prior to connection the pump wet the pump elements and mechanical seal by adding fluid to be pumped into suction and discharge ports Turn the shaft over several times in a clockwise direction to work fluid into the elements Piping Piping to the pump should be self supporting t
5. nitary joint must be pre assembled using the drive pins retained with the round snap rings Thread the assembly 24 into the shaft 26 ina clockwise direction RH thread with gaskets 137 and 140 and seal driver 141 in place 5 Thread the rotor 22 onto the flexible joint 24 in a clockwise direction RH thread 6 Slide the stator 21 on the rotor 22 On 331 and 332 Models insert the rounded end of the stator ring 135 into end of the stator prior to installing the stator on the rotor 7 Secure stator 21 and suction housing 2 with suction port vertically up to pump body 1A using quick clamp 8 Proceed as in installation instructions A KE A ASS y UL ae ae a V 77T L A Pass eee Use only on Sanitary Models Page 4 PARTS LIST 331 332 333 AND 344 MODELS Sanitary Hygienic Sanitary Joint Assy oe res Assy No 3308810017 Item 33306 33307 P N Description Qty No Description 34406 34407 3207314015 Pin 2 1A Discharge Housing 3403921007 3403922007 3208575015 Snap Ring 2 1B Bearing Housing 3304587001 3308802017 Joint End 2 1C Pump Base 3402369002 3402369001 3308803017 Joint Center 1 2 Suction Housing 3403919007 3403920007 21 Stator See Stator section below 22 Rotor See Roto
6. o avoid excessive strain on pump housings Drive On belt driven units adjust belt tension to point of non slip Do not overtighten On direct drive units coupling components should be aligned and spaced at least 1 16 apart Pump rotation must be clockwise when facing shaft to pre vent damage to pump Check direction of rotation before startup Maximum speed is 1750 rpm Table 1 Pump Data Pump Models 331 332 333 344 Discharge Pressure 150 100 50 40 psig maximum Table 2 Temperature Limits Elastomer Temperature Limits NBR Nitrile 10 160 F EPDM 10 210 F FPM Fluoroelastomer 10 240 F FDA Food Grade on Sanitary Models Page 2 OPERATION Self Priming With wetted pumping elements the pump is capable of 25 feet of suction lift when operating at 1750 rpm with pipe size equal to port size DO NOT RUN DRY The unit depends on liquid pumped for lubrication For proper lubrication the flow rate should be at least 10 of rated capacity Pressure and Temperature Limits See Table 1 for max imum discharge pressure of each model The unit is suitable for service at temperatures shown in Table 2 Storage Always drain the pump for extended storage periods by removing the suction housing and stator TROUBLESHOOTING WARNING Before making adjustments disconnect power source and thoroughly bleed pres sure from system prior to disassembly Fail
7. r section below with numbers for each series Not shown required P N Description Qty 24 Joint 3308810017 3208574001 6191522160 Screw 4 26 Drive Shaft 3308805000 6230012400 Lock Washer 4 29 Bearing 2 req 6300502031 66 Snap Ring 3201506000 69 Mechanical Seal 3208580000 3202424000 ABRASION RESISTANT SEALS 77 Slinger Ring 3206382000 Hygienic only 80 Clamp 3621775000 135 Stator Ring 331 amp 332 only 3621774001 3207812000 Elastomer All 331 344 Models 137 Gasket 62 OD 3308806101 NBR 3206460000 140 Gasket 78 OD 3308806102 EPDM 3206502000 141 Seal Driver 3308801015 FPM 3206503000 Recommended spare parts 001 Nitrile 003 EPDM 005 FPM 101 Nitrile 301 EPDM 501 FPM 102 Nitrile 302 EPDM 502 FPM Sanitary Models Stators Sanitary 331 332 333 344 21 Standard Stator FDA Nitrile 3403501110 3403502110 3403503110 3403504110 21 EPDM Stator t FDA EPDM 3403501300 3403502300 3403503300 3403504300 21 FPM Stator Not Food Grade 3403501520 3403502520 3403503520 3403504520 Hygienic Models Stators Hygienic 331 332 333 344 21 Standard Stator NBR All Models 3403501120 3403502120 3403503120 3403504120 21 EPDM Stator 3403501320 3403502320 3403503320 3403504320 21 FPM Stator 3403501520 3403502520 3403503520 3403504520 Rotors 22 316 SS All Models Sanitary 3208576000 3208577000 3208578000 3208579000 22 316 SS All Models Hygienic 3202933000 3202942000 3202936000 3202934000 t EPDM does not
8. ure to do so could lead to electric shock or serious bodily harm Failure To Pump 1 Belt or coupling slip Adjust belt tension or tighten set screw on coupling 2 Stator torn possibly excessive pressure Replace stator and check pressure at the discharge port 3 Wrong rotation Rotation must be clockwise when facing shaft 4 Threads in rotor or on shaft stripped Replace part Check for proper rotation 5 Excessive suction lift or vacuum Pump Overloads 1 Excessive discharge pressure Check discharge pressure for maximum rating given in Table 1 Check for obstruction in discharge pipe 2 Fluid viscosity too high Limit fluid viscosity to 20 000 CP or 100 000 SSU 3 Insufficient motor HP Check HP requirement consult factory Viscosity CP Limit RPM 1 300 1750 300 1 000 1200 1 000 2 000 700 2 000 5 000 350 5 000 10 000 180 10 000 20 000 100 Noisy Operation 1 Starved suction Check fluid supply length of suction line and obstructions in pipe 2 Bearings worn Replace parts check alignment belt tension pressure at the discharge port 3 Broken flexible joint Replace part check pressure at the discharge port 4 Insufficient mounting Mount to be secure to firm base Vibration induced noise can be reduced by using mount pads Mechanical Seal Leakage 1 Leakage at startup If leakage is slight allow pump to run several hours to let faces run in 2 Persistent seal leakage
Download Pdf Manuals
Related Search